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Regulation of S1PR2 by the EBV oncogene LMP1 in aggressive ABC-subtype diffuse large B-cell lymphoma

M. Vockerodt, K. Vrzalikova, M. Ibrahim, E. Nagy, S. Margielewska, R. Hollows, L. Lupino, R. Tooze, M. Care, W. Simmons, A. Schrader, T. Perry, M. Abdullah, S. Foster, G. Reynolds, A. Dowell, Z. Rudzki, D. Krappmann, D. Kube, C. Woodman, W. Wei,...

. 2019 ; 248 (2) : 142-154. [pub] 20190322

Jazyk angličtina Země Velká Británie

Typ dokumentu časopisecké články, práce podpořená grantem

Perzistentní odkaz   https://www.medvik.cz/link/bmc20023910

The Epstein-Barr virus (EBV) is found almost exclusively in the activated B-cell (ABC) subtype of diffuse large B-cell lymphoma (DLBCL), yet its contribution to this tumour remains poorly understood. We have focused on the EBV-encoded latent membrane protein-1 (LMP1), a constitutively activated CD40 homologue expressed in almost all EBV-positive DLBCLs and which can disrupt germinal centre (GC) formation and drive lymphomagenesis in mice. Comparison of the transcriptional changes that follow LMP1 expression with those that follow transient CD40 signalling in human GC B cells enabled us to define pathogenic targets of LMP1 aberrantly expressed in ABC-DLBCL. These included the down-regulation of S1PR2, a sphingosine-1-phosphate (S1P) receptor that is transcriptionally down-regulated in ABC-DLBCL, and when genetically ablated leads to DLBCL in mice. Consistent with this, we found that LMP1-expressing primary ABC-DLBCLs were significantly more likely to lack S1PR2 expression than were LMP1-negative tumours. Furthermore, we showed that the down-regulation of S1PR2 by LMP1 drives a signalling loop leading to constitutive activation of the phosphatidylinositol-3-kinase (PI3-K) pathway. Finally, core LMP1-PI3-K targets were enriched for lymphoma-related transcription factors and genes associated with shorter overall survival in patients with ABC-DLBCL. Our data identify a novel function for LMP1 in aggressive DLBCL. Copyright © 2019 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.

Department of Hematology and Oncology and GRK 1034 of the Deutsche Forschungsgemeinschaft Georg August University of Göttingen Göttingen Germany

Department of Histopathology Heartlands Hospital Birmingham UK

Institute of Cancer and Genomic Sciences University of Birmingham Birmingham UK

Institute of Cancer and Genomic Sciences University of Birmingham Birmingham UK Department of Anatomy and Cell Biology University Medical Centre Georg August University of Göttingen Göttingen Germany

Institute of Cancer and Genomic Sciences University of Birmingham Birmingham UK Department of Anatomy and Cell Biology University Medical Centre Georg August University of Göttingen Göttingen Germany Department of Hematology and Oncology and GRK 1034 of the Deutsche Forschungsgemeinschaft Georg August University of Göttingen Göttingen Germany

Institute of Cancer and Genomic Sciences University of Birmingham Birmingham UK Department of Clinical and Molecular Pathology Institute of Molecular and Translational Medicine Palacky University Olomouc Czech Republic

Institute of Cancer and Genomic Sciences University of Birmingham Birmingham UK Department of Pathology Universiti Putra Malaysia Seri Kembangan Malaysia

Institute of Cancer and Genomic Sciences University of Birmingham Birmingham UK Institute of Immunology and Immunotherapy University of Birmingham Birmingham UK

Institute of Cancer and Genomic Sciences University of Birmingham Birmingham UK Sheffield Institute of Translational Neuroscience University of Sheffield Sheffield UK

Institute of Cancer and Genomic Sciences University of Birmingham Birmingham UK South Egypt Cancer Institute Assiut University Assiut Egypt

Institute of Immunology and Immunotherapy University of Birmingham Birmingham UK

Leeds Institute of Cancer and Pathology University of Leeds Leeds UK

Research Unit Cellular Signal Integration Helmholtz Zentrum München Neuherberg Germany

Citace poskytuje Crossref.org

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